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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2017, Volume : 5, Issue : 5
First page : (20) Last page : (24)
Article doi: http://dx.doi.org/10.18782/2320-7051.5264

Natural Enemies in Rice Field with Different Levels of Fertilizers

G. Madhuri*, P. C. Dash, K. K. Rout and L. K. Rath
Dept. of Entomology, College of Agriculture, Orissa University of Agriculture and Technology, Bhubaneswar
*Corresponding Author E-mail: madhurigorege01@gmail.com
Received: 20.07.2017  |  Revised: 29.08.2017   |  Accepted: 3.09.2017  


The field experiment was conducted at Central Research Farm of Orissa University of Agriculture and Technology, Bhubaneswar during summer 2014-15 and kharif- 2015 to evaluate the effect of different graded levels of fertilizers and manure on incidence of natural enemies on rice with twelve treatments and four replications in sub plot size of 15m x 10m taking Lalat and Swarna as test cultivar during summer 2014-15 and kharif -2015 following the recommended package of practices. The imbalance nutrients like 150 % NPK, 100% N, 100% PK and 100% NP produced more insect incidence which as encouraged the spiders on rice in various treatments it was ascertained that the treatment T9 (100 % N) harboured more spider/hill followed by T3 (1.91/ hill) and T10 (1.72/ hill). In rest of the treatments the spider population varies from 0.98/hill T12 to 1.41/hill in T1. Same trend followed by Mirid bug with high population in T9 (2.87/ hill) compared to rest of the treatments. Incidence of Mirid bugs and different species of spiders increased with application of increased doses of nitrogen and NPK fertilizers. Whereas, balanced nutrients (100% NPK) supplemented with micro-nutrients (S, B, Zn, FYM) resulted lower incidence of insect pests followed by Mirid bugs and spiders.

Key words: Spiders, Mired bug, Rice, Fertilizers and Micronutrients.

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Madhuri, G., Dash, P.C., Rout, K.K. and Rath, L.K., Natural Enemies in Rice Field with Different Levels of Fertilizers, Int. J. Pure App. Biosci.5(5): 20-24 (2017). doi: http://dx.doi.org/10.18782/2320-7051.5264